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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* Copyright (C) 2005 - 2007 Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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#ifndef __LS_DEVICE_PARAMETER_FACTORY_H__ |
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#define __LS_DEVICE_PARAMETER_FACTORY_H__ |
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|
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#include <map> |
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#include <vector> |
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|
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#include "../common/global.h" |
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#include "../common/optional.h" |
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#include "../common/Exception.h" |
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#include "DeviceParameter.h" |
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|
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namespace LinuxSampler { |
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|
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class DeviceParameterFactory { |
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public: |
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typedef std::map<String,String> StringMap; // nasty workaround for a GCC bug (see GCC bug #15980, #57) |
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|
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class InnerFactory { |
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public: |
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InnerFactory(DeviceParameterFactory* pParent) { this->pParent = pParent; } |
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virtual DeviceCreationParameter* Create(std::map<String,String> Parameters = StringMap()) = 0; |
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virtual DeviceCreationParameter* Create(String val) = 0; |
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protected: |
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DeviceParameterFactory* pParent; |
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}; |
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|
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template <class Parameter_T> |
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class InnerFactoryTemplate : public InnerFactory { |
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public: |
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InnerFactoryTemplate(DeviceParameterFactory* pParent) : InnerFactory(pParent) {} |
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|
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/// Create parameter with respective value in map or use its default value. |
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virtual DeviceCreationParameter* Create(std::map<String,String> Parameters = StringMap()) { |
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const String paramName = Parameter_T::Name(); |
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if (Parameters.count(paramName)) { |
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// parameter with this name was specified, so use that given value |
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return new Parameter_T(Parameters[paramName]); |
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} |
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// parameter value not given, use its default value ... |
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// ... but first resolve its dependencies to other parameters |
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Parameter_T param; |
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std::map<String,DeviceCreationParameter*> dependencies = param.DependsAsParameters(); |
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std::map<String,String> dependencysParams; |
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for (std::map<String,DeviceCreationParameter*>::iterator iter = dependencies.begin(); iter != dependencies.end(); iter++) { |
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if (Parameters.count(iter->first)) { |
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// value for this dependency parameter already given |
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dependencysParams[iter->first] = Parameters[iter->first]; |
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} else { |
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// no value provided for this dependency parameter, use its default value |
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// (FIXME: no sanity check for cyclic dependencies here yet) |
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DeviceCreationParameter* pDependencyParam = pParent->Create(iter->first, Parameters); |
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if (pDependencyParam) { |
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dependencysParams[iter->first] = pDependencyParam->Value(); |
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delete pDependencyParam; |
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} |
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} |
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} |
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// now that we resolved all dependencies, we can finally determine parameter's default value |
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optional<String> defaultValue = param.Default(dependencysParams); |
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return (defaultValue) ? new Parameter_T(*defaultValue) : new Parameter_T(); |
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} |
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/// Create parameter with given value. |
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virtual DeviceCreationParameter* Create(String val) { return new Parameter_T(val); } |
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}; |
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|
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template <class Parameter_T> |
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static void Register(DeviceParameterFactory* factory) { |
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factory->InnerFactories[Parameter_T::Name()] = new InnerFactoryTemplate<Parameter_T>(factory); |
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} |
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|
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template <class Parameter_T> |
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static void Unregister(DeviceParameterFactory* factory) { |
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std::map<String, InnerFactory*>::iterator iter = factory->InnerFactories.find(Parameter_T::Name()); |
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delete iter->second; |
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factory->InnerFactories.erase(Parameter_T::Name()); |
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} |
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|
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std::map<String,DeviceCreationParameter*> CreateAllParams ( std::map<String,String> Parameters ); |
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std::map<String,DeviceCreationParameter*> CreateAllParams (); |
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|
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DeviceCreationParameter* Create(String ParameterName, std::map<String,String> Parameters = StringMap()) throw (Exception); |
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DeviceCreationParameter* Create(String ParameterName, String val) throw (Exception); |
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|
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protected: |
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std::map<String, InnerFactory*> InnerFactories; |
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}; |
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|
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} // namespace LinuxSampler |
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|
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#endif // __LS_DEVICE_PARAMETER_FACTORY_H__ |
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